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The rubber rollers of the printing press (including water rollers and ink rollers) play an important role in the printing process, but in actual production, many printing companies will replace the original rubber rollers soon after they are used. Most manufacturers have insufficient cleaning and maintenance of the rubber rollers, leading to premature aging of the original rubber rollers, resulting in printing failures and cost losses. In this regard, this article makes a large inventory of the reasons for the wear of the rubber rollers of the printing press, and at the same time shares 10 tips for the maintenance of the rubber rollers.
Reasons
In the process of using the rubber roller of the printing press, due to improper use or operation, the life of the rubber roller will be shortened or damaged. What are the reasons?
① Improper adjustment of the pressure of the ink roller will cause the ink roller to wear out, especially when the pressure is heavy at one end and light at the other, it is easy to cause damage to the rubber roller.
② If you forget to close the handles at both ends of the water bucket roller, the glue of the metering roller will be torn and damaged. If one end is not closed or the other end is not in place, it will cause the metering roller and the supporting water roller to wear.
③ During the process of loading the PS plate, the PS plate is not in place and the pull screws on the bite and the tail of the PS plate are not tightened. The PS plate will wear out the rubber roller due to the untightened part and the hollow and protruding parts; at the same time, the PS plate is pulled. If the top plate is too tight or the top plate is too strong, it will cause the plate to deform or break and cause damage to the ink roller, especially the lower rubber hardness of the ink roller, and the damage is the most obvious.
④ During the printing process, when printing long orders, the running conditions of the two ends and the middle are different, which will cause the two ends of the ink roller to wear.
⑤ Poorly printed paper, paper powder and sand falling off the paper will cause the ink roller and copper roller to wear.
⑥ Use a sharp tool to draw gauge lines or make other marks on the printing plate, causing damage to the ink roller.
⑦ During the printing process, due to the poor local water quality and high hardness, and the printing factory did not install proper water treatment devices, this resulted in the accumulation of calcifications on the surface of the ink roller, which increased the hardness of the rubber and increased friction. The problem will not only cause the ink roller to wear out, but also cause serious printing quality problems.
⑧ The ink roller has not been regularly maintained and recycled.
⑨ If the car is not washed for a long time and the ink on the metering roller surface will also cause abrasion.
⑩ Special processes, such as printing gold and silver cardboard, stickers or films, require special inks and special additives, which will accelerate the cracking and aging of the rubber roller.
⑪ The roughness of the ink particles, especially the roughness of the UV ink, has a direct effect on the abrasion of the rubber roller.
⑫ The rubber rollers in different parts wear differently at different speeds. For example, the ink transfer roller, because its movement is static → high speed → static reciprocating continuously, its degree of wear is faster than normal.
⑬ Due to the axial movement of the ink roller and the ink roller, the abrasion of the two ends of the rubber roller is larger than that of the middle.
⑭ When the machine is shut down for a long time (such as the Spring Festival holiday, etc.), the rubber roller is statically squeezed for a long time, resulting in uneven diameter of the rubber body of the rubber roller, and uneven rotation and extrusion deformation of the rubber roller, which intensifies the abrasion of the rubber roller.
⑮ The temperature of the working environment is not well controlled (too cold or too hot), which exceeds the physical properties of the rubber roller and aggravates the abrasion of the rubber roller.